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ADS1281

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用于地震监测和能源勘探的超高分辨率 4kSPS 单通道 Δ-Σ ADC

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ADS1281

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产品详情

Resolution (Bits) 31 Sample rate (max) (ksps) 4 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 2.7, 5 Input voltage range (min) (V) -2.7, 0 Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 12 Analog supply voltage (min) (V) -2.5, 0 Analog supply voltage (max) (V) 2.5, 5 SNR (dB) 130 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 31 Sample rate (max) (ksps) 4 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 2.7, 5 Input voltage range (min) (V) -2.7, 0 Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 12 Analog supply voltage (min) (V) -2.5, 0 Analog supply voltage (max) (V) 2.5, 5 SNR (dB) 130 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4
  • High Resolution:
    • 130dB SNR (250SPS)
    • 127dB SNR (500SPS)
  • High Accuracy:
    • THD: –122dB (typ), –115dB (max)
    • INL: 0.6ppm
  • Inherently Stable Modulator with Fast Responding Over-Range Detection
  • Flexible Digital Filter:
    • Sinc + FIR + IIR (Selectable)
    • Linear or Minimum Phase Response
    • Programmable High-Pass Filter
    • Selectable FIR Data Rates:
      • 250SPS to 4kSPS
  • Filter Bypass Option
  • Low Power Consumption:
    • Operating: 12mW
    • Shutdown: 10µW
  • Calibration Engine for Offset and
    Gain Correction
  • SYNC Input
  • Analog Supply:
    • Unipolar (+5V) or Bipolar (±2.5V)
  • Digital Supply: 1.8V to 3.3V
  • APPLICATIONS
    • Energy Exploration
    • Seismic Monitoring
    • High-Accuracy Instrumentation

All other trademarks are the property of their respective owners
  • High Resolution:
    • 130dB SNR (250SPS)
    • 127dB SNR (500SPS)
  • High Accuracy:
    • THD: –122dB (typ), –115dB (max)
    • INL: 0.6ppm
  • Inherently Stable Modulator with Fast Responding Over-Range Detection
  • Flexible Digital Filter:
    • Sinc + FIR + IIR (Selectable)
    • Linear or Minimum Phase Response
    • Programmable High-Pass Filter
    • Selectable FIR Data Rates:
      • 250SPS to 4kSPS
  • Filter Bypass Option
  • Low Power Consumption:
    • Operating: 12mW
    • Shutdown: 10µW
  • Calibration Engine for Offset and
    Gain Correction
  • SYNC Input
  • Analog Supply:
    • Unipolar (+5V) or Bipolar (±2.5V)
  • Digital Supply: 1.8V to 3.3V
  • APPLICATIONS
    • Energy Exploration
    • Seismic Monitoring
    • High-Accuracy Instrumentation

All other trademarks are the property of their respective owners

The ADS1281 is an extremely high-performance, single-chip analog-to-digital converter (ADC) designed for the demanding needs of energy exploration and seismic monitoring environments. The single-chip design promotes board area savings for improvements in high-density applications.

The converter uses a fourth-order, inherently stable, delta-sigma () modulator that provides outstanding noise and linearity performance. The modulator is used either in conjunction with the on-chip digital filter, or can be bypassed for use with post-processing filters.

The digital filter consists of sinc and finite impulse response (FIR) low-pass stages followed by an infinite impulse response (IIR) high-pass filter (HPF) stage. Selectable decimation provides data rates from 250 to 4000 samples per second (SPS). The FIR low-pass stage provides both linear and minimum phase response. The HPF features an adjustable corner frequency. On-chip gain and offset scaling registers support system calibration.

The synchronization input (SYNC) can be used to synchronize the conversions of multiple ADS1281s. The SYNC input also accepts a clock input for continuous alignment of conversions from an external source.

Together, the modulator and filter dissipate only 12mW. The ADS1281 is available in a compact TSSOP-24 package and is fully specified from –40°C to +85°C, with a maximum operating range to +125°C.

The ADS1281 is an extremely high-performance, single-chip analog-to-digital converter (ADC) designed for the demanding needs of energy exploration and seismic monitoring environments. The single-chip design promotes board area savings for improvements in high-density applications.

The converter uses a fourth-order, inherently stable, delta-sigma () modulator that provides outstanding noise and linearity performance. The modulator is used either in conjunction with the on-chip digital filter, or can be bypassed for use with post-processing filters.

The digital filter consists of sinc and finite impulse response (FIR) low-pass stages followed by an infinite impulse response (IIR) high-pass filter (HPF) stage. Selectable decimation provides data rates from 250 to 4000 samples per second (SPS). The FIR low-pass stage provides both linear and minimum phase response. The HPF features an adjustable corner frequency. On-chip gain and offset scaling registers support system calibration.

The synchronization input (SYNC) can be used to synchronize the conversions of multiple ADS1281s. The SYNC input also accepts a clock input for continuous alignment of conversions from an external source.

Together, the modulator and filter dissipate only 12mW. The ADS1281 is available in a compact TSSOP-24 package and is fully specified from –40°C to +85°C, with a maximum operating range to +125°C.
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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 High-Resolution A/D Converter 数据表 (Rev. D) 2010年 6月 1日
应用手册 计算 Δ-Σ ADC 的转换延迟和系统周期时间 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2024年 3月 27日
电子书 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020年 6月 19日
应用手册 所选封装材料的热学和电学性质 2008年 10月 16日
应用手册 模数规格和性能特性术语表 (Rev. A) 最新英语版本 (Rev.B) 2008年 10月 16日
应用手册 高速数据转换 英语版 2008年 10月 16日

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ADS1281 IBIS Model

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The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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TSSOP (PW) 24 Ultra Librarian
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  • MSL 等级/回流焊峰值温度
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